lower arm and balljoint

[umpkin]

Hey guys, does anyone have a lower arm with the balljoint removed, i bought one today, but want to make sure of the size of the hole in the lower arm before i try and fit it, had a bad experience before. they got it in using my Reg no. and i know my lower arm are genuine nissan because i bought them.

so just need to know the diameter of the hole.

Cheers!!!!!!